This might be helpful in some specific cases as it is very well designed. But you are very restricted in you options and it's error prone. To me this seems very untested. As if the developer him/herself tested it... Once you try something slightly different there are design bugs everywhere and you are basically trying to evade those bugs all the time by changing the settings until it works. In my case it just didn't work. I give up after a whole days of nonstop trying to make it work... 3 stars only because the designs are good